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The snowstorm that has stalled over Colorado is creating some hazardous driving conditions on much of the Eastern Plains.

A Douglas County High School bus slid off a road and backwards down a hill just south of Castle Rock Monday morning. District spokeswoman Carol Kaness says two students were treated and released from a hospital for minor injuries.

In El Paso County, search and rescue teams are patrolling county roads to try to find and help any stranded motorists. And several weather-caused rockslides have been reported, including two within seven miles of each other in Boulder Canyon.

And authorities say a 60-year-old Denver woman has died after an eight-inch-diameter tree limb snapped off and struck her. Her name hasn't been released and an autopsy is scheduled.

Several roads around the state are closed, including the 80-mile stretch of Interstate 70 between Limon and Denver and US 24 between Limon and Colorado Springs. Chain restrictions are in place for most mountain passes.

The heavy, wet snow has also knocked out electricity for about 25,000 houses and businesses in Denver. Xcel Energy officials don't know when the power will be restored, but crews are working on it.

The National Weather Service says the storm is likely to stay in the area through Tuesday morning, and winter storm warnings are in place for about the central 3rd of the state stretching from New Mexico to Wyoming and from east of Limon to west of Vail.

Forecasters say some parts of the southern mountains might get up to four feet of snow.